2 5x 6 =- 1 5 x 3 July 8, 2019 16 32 64 128 2 5x (- 3 7 )- 1 6 x 3 2 1 14x2 5 5x 1 6 7x 2 9 x 5 3 1 3 5x 6 )- 1 2 x 5 )= 3 2 5x 6 x 2 )( 2x 1 )( 3x 5 ))